Table 5.

Cost Difference Between Early (≤30 days) and Late (> 30 days) Readmission Events Stratified by Condition and Age

	Unadjusted model a		Adjusted model a, b
	Cost difference (95%CI)	P	Cost difference (95%CI)	P
Acute Myocardial Infarction
All age groups	$4327.92 ($3902.73 – $4762.70)	< 0.0001	$4974.12 ($4388.94 – $5572.89)	< 0.0001
18–39 years	$-1043.86 ($-3611.68 – $1879.17)	0.47	$-1211.50 ($-2944.96 – $1845.86)	0.37
40–64 years	$3364 ($2604.52 – $4148.07)	< 0.0001	$1403.63 ($982.66 – $1874.51)	< 0.0001
≥ 65 years	$5044 ($4522.25 – $5571.34)	< 0.0001	$15,981.08 ($13,712.21 – $18,444.93)	< 0.0001
Heart Failure
All age groups	$6448.47 ($6260.52 – $6753.10)	< 0.0001	$8214.33 ($7805.49 – $8631.4)	< 0.0001
18–39 years	$13,362.79 ($11,110.16 – $15,762.72)	< 0.0001	$20,035.9 ($15,401.37 – $25,548.43)	< 0.0001
40–64 years	$ 7512.03 ($6969 – $8066.45)	< 0.0001	$4623.18 ($4157.55 – $5120.16)	< 0.0001
≥ 65 years	$ 5752.42 ($5481.69 – $6029.36)	< 0.0001	$16,461.36 ($15,275.93 – $17,711.23)	< 0.0001
Pneumonia
All age groups	$8856.43 ($8610.4 – $9109.65)	< 0.0001	$8027.16 ($7726.24 – $8338.59)	< 0.0001
18–39 years	$12,745.66 ($11,419.96 – $14,122.99)	< 0.0001	$12,867.63 ($10,991.28 – $14,937.81)	< 0.0001
40–64 years	$9890.97 ($9373.67 – $10,419.55)	< 0.0001	$6020.75 ($5523.78 – $6553)	< 0.0001
≥ 65 years	$8228.76 ($7944.76 – $8518.59)	< 0.0001	$12,622.84 ($11,880.55 – $13,385.01)	< 0.0001
Chronic Obstructive Pulmonary Disease
All age groups	$8390.38 ($8148.52 – $8633.39)	< 0.0001	$6642.03 ($6391.26 – $6901.31)	< 0.0001
40–64 years	$7754.06 ($7283.05 – $8229.44)	< 0.0001	$5107.02 ($4664.35 – $5562.89)	< 0.0001
≥ 65 years	$7751.64 ($7464.94 – $8039.25)	< 0.0001	$10,728.7 ($10,074.03 – $11,410.21)	< 0.0001

^a Standardized to 2015 U.S. dollars

^b Adjusted for age, gender, median household income, and Elixhauser comorbidity index scores